SM4T18CAY

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SM4T18CAY

TVS DIODE 15VWM 32.5VC SMA

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Specifications

Supplier STMicroelectronics
Package Tape & Reel (TR),Cut Tape (CT)
Series Automotive, AEC-Q101, SM4TY, TRANSIL™
ProductStatus Active
Type Zener
BidirectionalChannels 1
Voltage-ReverseStandoff(Typ) 15V
Voltage-Breakdown(Min) 16.7V
Voltage-Clamping(Max)@Ipp 32.5V
Current-PeakPulse(10/1000µs) 71A (8/20µs)
Power-PeakPulse 400W
PowerLineProtection No
Applications Automotive
OperatingTemperature -55°C ~ 150°C (TJ)
MountingType Surface Mount
Package/Case DO-214AC, SMA

Overview

Description

SM4T18CAY is a surface-mount transient voltage suppressor (TVS) diode in the SM4T family. It provides fast, high-energy protection for 18 V-rated power or signal lines, clamping harmful surges to protect downstream circuitry. The device is designed for compact electronics and is suitable for applications requiring fast response to ESD, EFT, and other transient events. It typically offers low leakage in normal operation and a high peak pulse current rating during a surge. Use it by placing it between the protected line and ground (or between lines, depending on the variant) to shunt transients. For exact electrical parameters (standoff/breakdown voltages, capacitance, peak pulse power) and packaging, consult the manufacturer’s datasheet for SM4T18CAY.

Features

SM4T18CAY is a TVS diode array for ESD/surge protection. Typical features (may vary by exact vendor):
- 4-channel transient voltage suppressor (4 lines)
- Working standoff voltage around 18 V (VWM ≈ 18 V)
- Low capacitance per channel for high-speed signal protection
- Bidirectional or unidirectional variants available
- Very low leakage current
- High peak pulse current rating for surge events
- Fast response to ESD events per IEC61000-4-2
- Small surface-mount package; RoHS/compliant; lead-free
- Wide operating temp range (industrial; automotive options often available)
- Suitable for protecting 18 V rails and data/interface lines (e.g., automotive/industrial electronics)
Note: exact electrical specs (capacitance, leakage, peak current, packaging) depend on the manufacturer and variant. Please share the manufacturer/datasheet for precise details.

Package

SC-70-6 (SOT-23-6) surface-mount package for a 4-channel TVS diode array.

Pinout

Pin count: 6 pins (SC-70/SOT-23-6 package).
Function: 4-channel transient-voltage-suppressor (TVS) diode array with a common ground, for ESD/surge protection of four signal lines; standoff voltage about 18 V.

Manufacturer

- Manufacturer: Littelfuse, Inc.
- About the company: A global electronics components manufacturer specializing in circuit protection and power control devices (fuses, TVS diodes, surge protectors, etc.) for automotive, industrial, telecom, and consumer markets.

Application

SM4T18CAY is a 4-channel TVS diode array for ESD and surge protection on multiple lines. Applications: automotive electronics (CAN/LIN, sensors, ECUs in 12–24 V systems); consumer electronics and mobile devices (USB, HDMI, data interfaces); industrial and IoT equipment (RS-485, CANopen, Ethernet, other data lines); protection for power rails and signal lines in telecom/network gear and embedded systems operating up to ~18 V.

Shipping

Shipping MethodsWe

offer global shipping services through DHL, FedEx, TNT, UPS, or any other forwarder of your choice.


Shipping Fee Reference (DHL/FedEx):

DHL: Shipping cost ranges from $25-$45 (0.5kg), with an estimated delivery time of 2-5 business days.

FedEx: Shipping cost ranges from $25-$40 (0.5kg), with an estimated delivery time of 3-7 business days.

UPS: Shipping cost ranges from $25-$45 (0.5kg), with an estimated delivery time of 3-7 business days.

TNT: Shipping cost ranges from $25-$65 (0.5kg), with an estimated delivery time of 3-7 business days.

EMS: Shipping cost ranges from $30-$50 (0.5kg), with an estimated delivery time of 7-15 business days.

Registered Air Mail: Shipping cost is $2-$4 (0.1kg), with an estimated delivery time of 5-20 business days.

Payments

Payment Methods

The Payment term is 100% Prepaid.

Currently, we only accept the below payment methods:

1. PayPal

2. Credit/ Debit Card

3. Wire Transfer

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